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Leaded gas wasn't fully stopped until 1996. Still in some aviation used (piston plane engines).
But yes I wonder about shooting ranges too. I think a couple times a year at an indoor range isn't insignificant.
Yeah some of the replies have good points about lead damage being cumulative and showing up later, so maybe the workers in those studies I mentioned showed impairment because they were chronically exposed over some lengthy period and the impairments they measured were because of the cumulative exposure?
That also makes me think again though that, like you said, going to the indoor range a few times per year and not taking proper measures to clean oneself could cause some cumulative effect over time?
I mean check out this post where this person’s lead level was over 15 and decreased to 8 after a month of no shooting. Idk but reaching a blood lead level of 15 can’t be good right? Especially if you’re exposed repeatedly over a long period of time?
https://www.reddit.com/r/liberalgunowners/comments/1h6qtis/update_on_lead_levels_from_shooting_30_days_of_no/
Iirc indoor ranges need ventilation systems because, you know, all the combustion. I don't know if the residue on, say, counters, etc, is enough of a buildup to be significant but I would be surprised if airborne particulate was particularly high.
I saw something that yes the lead levels were high. Ventilation only does so much. It's that old math problem: you replace half, you replace half, etc, it never gets to zero. And in this case you're adding more.